Allow skipping processing system tests

Generating system test derivations are difficult, since you generally need to
do potentially expensive builds for the system you're generating the system
tests for. You might not want to disable grafts for instance because you might
be trying to test whatever the test is testing in the context of grafts being
enabled.

I'm looking at skipping the system tests on data.guix.gnu.org, because they're
not used and quite expensive to compute.

guix-data-service/jobs.scm

@@ -26,14 +26,19 @@
             default-max-processes))
 
 (define* (process-jobs conn #:key max-processes
-                       latest-branch-revision-max-processes)
+                       latest-branch-revision-max-processes
+                       skip-system-tests?)
   (define (fetch-new-jobs)
     (fetch-unlocked-jobs conn))
 
   (define (process-job job-id)
-    (execlp "guix-data-service-process-job"
-            "guix-data-service-process-job"
-            job-id))
+    (apply execlp
+           "guix-data-service-process-job"
+           "guix-data-service-process-job"
+           job-id
+           (if skip-system-tests?
+               '("--skip-system-tests")
+               '())))
 
   (define (handle-job-failure job-id)
     (record-job-event conn job-id "failure")

guix-data-service/jobs/load-new-guix-revision.scm

@@ -1473,7 +1473,8 @@ WHERE job_id = $1")
 
     inf))
 
-(define (extract-information-from conn store guix-revision-id commit store-path)
+(define* (extract-information-from conn store guix-revision-id commit store-path
+                                   #:key skip-system-tests?)
   (simple-format #t "debug: extract-information-from: ~A\n" store-path)
 
   (let ((inf (start-inferior-for-data-extration store store-path)))
@@ -1490,8 +1491,12 @@ WHERE job_id = $1")
                 (with-time-logging "getting inferior derivations"
                   (all-inferior-package-derivations store inf packages)))
                (inferior-system-tests
-                (with-time-logging "getting inferior system tests"
-                  (all-inferior-system-tests inf store)))
+                (if skip-system-tests?
+                    (begin
+                      (simple-format #t "debug: skipping system tests\n")
+                      '())
+                    (with-time-logging "getting inferior system tests"
+                      (all-inferior-system-tests inf store))))
                (packages-data
                 (with-time-logging "getting all inferior package data"
                   (all-inferior-packages-data inf packages))))
@@ -1636,7 +1641,8 @@ WHERE job_id = $1")
 
 (prevent-inlining-for-tests load-channel-instances)
 
-(define (load-new-guix-revision conn store git-repository-id commit)
+(define* (load-new-guix-revision conn store git-repository-id commit
+                                 #:key skip-system-tests?)
   (let* ((git-repository-fields
           (select-git-repository conn git-repository-id))
          (git-repository-url
@@ -1663,7 +1669,9 @@ WHERE job_id = $1")
           (and
            (extract-information-from conn store
                                      guix-revision-id
-                                     commit store-item)
+                                     commit store-item
+                                     #:skip-system-tests?
+                                     skip-system-tests?)
 
            (if (defined? 'channel-news-for-commit
                  (resolve-module '(guix channels)))
@@ -2082,7 +2090,7 @@ SKIP LOCKED")
 
 (prevent-inlining-for-tests setup-logging)
 
-(define (process-load-new-guix-revision-job id)
+(define* (process-load-new-guix-revision-job id #:key skip-system-tests?)
   (with-postgresql-connection
    (simple-format #f "load-new-guix-revision ~A" id)
    (lambda (conn)
@@ -2121,7 +2129,9 @@ SKIP LOCKED")
                              (load-new-guix-revision conn
                                                      store
                                                      git-repository-id
-                                                     commit))))
+                                                     commit
+                                                     #:skip-system-tests?
+                                                     skip-system-tests?))))
                         (lambda (key . args)
                           (simple-format (current-error-port)
                                          "error: load-new-guix-revision: ~A ~A\n"

scripts/guix-data-service-process-job.in

@@ -38,6 +38,30 @@
 ;; Make stack traces more useful
 (setenv "COLUMNS" "256")
 
-(match (command-line)
-  ((name job)
-   (process-load-new-guix-revision-job job)))
+(define %options
+  (list (option '("skip-system-tests") #f #f
+                (lambda (opt name _ result)
+                  (alist-cons 'skip-system-tests #t result)))))
+
+(define %default-options '())
+
+(define (parse-options args)
+  (args-fold
+   args %options
+   (lambda (opt name arg result)
+     (error "unrecognized option" name))
+   (lambda (arg result)
+     (alist-cons
+      'arguments
+      (cons arg
+            (or (assoc-ref result 'arguments)
+                '()))
+      (alist-delete 'arguments result)))
+   %default-options))
+
+(let ((opts (parse-options (cdr (program-arguments)))))
+  (match (assq-ref opts 'arguments)
+    ((job)
+     (process-load-new-guix-revision-job
+      job
+      #:skip-system-tests? (assq-ref opts 'skip-system-tests)))))

scripts/guix-data-service-process-jobs.in

@@ -41,7 +41,10 @@
                 (lambda (opt name arg result)
                   (alist-cons 'latest-branch-revision-max-processes
                               (string->number arg)
-                              result)))))
+                              result)))
+        (option '("skip-system-tests") #f #f
+                (lambda (opt name _ result)
+                  (alist-cons 'skip-system-tests #t result)))))
 
 (define %default-options
   ;; Alist of default option values
@@ -70,4 +73,6 @@
                    #:max-processes (assq-ref opts 'max-processes)
                    #:latest-branch-revision-max-processes
                    (or (assq-ref opts 'latest-branch-revision-max-processes)
-                       (* 2 (assq-ref opts 'max-processes)))))))
+                       (* 2 (assq-ref opts 'max-processes)))
+                   #:skip-system-tests?
+                   (assq-ref opts 'skip-system-tests)))))

tests/jobs-load-new-guix-revision.scm

@@ -59,7 +59,8 @@
          (mock
           ((guix-data-service jobs load-new-guix-revision)
            extract-information-from
-           (lambda (conn store guix-revision-id commit store-path)
+           (lambda* (conn store guix-revision-id commit store-path
+                          #:key skip-system-tests?)
              #t))
 
           (mock
@@ -170,7 +171,8 @@
           (mock
            ((guix-data-service jobs load-new-guix-revision)
             extract-information-from
-            (lambda (conn store git-repository-id commit store-path)
+            (lambda* (conn store git-repository-id commit store-path
+                           #:key skip-system-tests?)
               #f))
 
            (mock